New answers tagged

4 votes

Are all bond lengths equal in 8 - annulene?

Background: 8-Annulene actually is supposed to be anti-aromatic but it twists to become non-aromatic. It has a tub-shaped structure. Answer: Given there are both single and double bonds, the bond ...
Harikrishnan M's user avatar
4 votes

Why would the chlorine atom be assigned a positive partial charge in chloroform and carbon tetrachloride?

Calculation issues aside, chlorine may become positively charged through pi back-donation similar to the role of the oxygen in trifluoramine oxide. In this interaction, formally nonbonding electron ...
Oscar Lanzi's user avatar
  • 53.2k
1 vote

Why does the two OH bonds in H2O have different bond disassociation enthalpies? How does the bond cleavage happen here?

Two $\ce{OH}$ bonds in any molecule have different dissociation enthalpies, as only the first one is related to the original molecule. The second one is related to the original molecule with the ...
Poutnik's user avatar
  • 39.2k
0 votes

Why do amides require much harsher conditions for hydrolysis than esters?

Think about the stabilities of the resonance structures. Nitrogen tends to be stable in its cationic form compared to oxygen; a protonated amine has a pKa around 9.5, whereas an alcohol has a pKa of ...
Miko's user avatar
  • 46
0 votes

Why is HF considered a covalently bonded compound?

General definition of ionic says that there should be an electronegativity difference of more than 2. H is 2.2, F is 3.98, so not quite a big enough difference, which is true of all hydrogen halides. ...
Heidi's user avatar
  • 1
0 votes

Why do amides require much harsher conditions for hydrolysis than esters?

Both Amide and Ester groups possess resonance stabilization, Amides however are "better" at it then its cousin esters. This is due to Nitrogen from the amide group having less ...
Rennie Study's user avatar
3 votes

Do PH3F2 and XeS2 exist (in the light of hybridisation and Valence Bond Theory)? [Doubt in JEE question]

In theory, all of the mentioned compounds in the answer don't exist expect for $\ce{PH3F2}$. Difluorophosphorane has been characterized through spectroscopical method long time ago. Here is an excerpt ...
Nilay Ghosh's user avatar
  • 25.2k

Top 50 recent answers are included